Uxcell LJ18A3-8-Z/AX NPN NC Tubular Inductive Proximity Sensor Approach Switch, DC 6V - 36V/300 mA, 8 mm Product Name: Inductive Proximity Switch. Model: LJ18A3-8-Z/AX. Theory: Inductive Sensor Wire Type:3 Wire Type (Black, Brown, Blue). Switch Appearance Type: Cylinder Type Output Type: NPN NC(Normal Close). Supply Voltage: DC 6-36V.Current Output: 300mA Diameter of Head: 18mm. Detecting Distance: 8mm. Response Frequency: 100Hz Detect Object: Iron. Operating Temperature: -25C to +55C (Non-freezing Condition)